反应详情

A solution of 2.3 g (11.4 mmol) of methyl 1-hydroxy-naphthalene-2-carboxylate in 15 ml of dry tetrahydrofuran was treated with 0.51 g (17 mmol) of sodium hydride (80%) and subsequently 2.13 g of 2-methoxyethoxymethyl chloride were added dropwise while cooling with ice. After 3 hours at room temperature the solution was extracted with aqueous sodium hydrogen carbonate solution and the organic phase was separated, dried over sodium sulphate and evaporated under reduced pressure. For purification, the crude product was chromatographed on silica gel using a 9:1 mixture of methylene chloride and ether as the eluent. In addition to 1.55 g of starting material there were obtained 1.2 g of methyl 1-(2-methoxy-ethoxymethyl)-naphthalene-2-carboxylate; MS: 290 (M)+.

1. additionwere added dropwise
2. temperaturewhile cooling with ice
3. extractionAfter 3 hours at room temperature the solution was extracted with aqueous sodium hydrogen carbonate solution
4. customthe organic phase was separated
5. dry with materialdried over sodium sulphate
6. customevaporated under reduced pressure
7. customFor purification
8. customthe crude product was chromatographed on silica gel using
9. additiona 9:1 mixture of methylene chloride and ether as the eluent
10. additionIn addition to 1.55 g of starting material there